What metaphors are used in The Prince and the Pauper by Mark Twain?

Examples of Metaphor:

They felt much as if they were piloting a great ship through a dangerous channel; they were on the alert constantly, and found their office no child’s play.

Time wore on pleasantly, and likewise smoothly, on the whole. Snags and sandbars grew less and less frequent, and Tom grew more and more at his ease, seeing that all were so lovingly bent upon helping him and overlooking his mistakes.